Granted Patent
Utility
US 6,467,405 · App. 09/601,487
Method for engraving printing blocks
Inventor:
Jan Herrmann Breiholdt
Patented Case
View Patent ↗
Granted: Oct 22, 2002
Filed: Aug 3, 2000
Inventor
Jan Herrmann Breiholdt
Assignee (at issue)
Heidelberger Druckmaschinen AG
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.